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GATE CS and IT 2015 Paper

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Question : 23

Total: 65

Suppose two hosts use a TCP connection to transfer a large file. Which of the following statements is/are FALSE with respect to the TCP connection?
  I. If the sequence number of a segment is m, then the sequence number of the subsequent segment is always m+1.
  II. If the estimated round trip time at any given point of time is t sec, the value of there transmission timeout is always set to greater than or equal to t sec.
  III. The size of the advertised window never changes during the course of the TCP connection.
  IV. The number of unacknowledged bytes at the sender is always less than or equal to theadvertised window

III only
I and III only
I and IV only
II and IV only

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